Optical wave courses at the Department of Science discuss waves and optics. The purpose of this study is to describe the problem-solving ability of students in optical wave courses. The method used is quantitative descriptive with one group pre-test post-test design. Method of data collection involves a test given to students before and after the student worksheet was provided in the course of optical waves. This study showed an increase in scores experienced by as many as 15 students. This shows that the problem-solving ability of students has increased.

Inquiry-based science issues approach facilitates the development of scientific skills through research activities on surrounding science issues. The purpose of this research was to understand the influence of Inquiry-based science issues on practical skills of Junior High School students. This research employed quasi-experimental research method, equipped with pre-test, post-test non-equivalent control group design. The sample of sixty junior high school students in Yogyakarta was picked for this study.  The instruments used were observation sheets on practical skills, practical skills test, and instructional learning sheets. The data collected were analyzed using N-Gain, percentage, and Analysis of Covariate (ANCOVA) at 0.05 significance level. The result revealed that Inquiry Science Issues was more effective in fostering students’ practical skills than the scientific approach. There was a significant effect of treatment on students’ practical skills while no interaction between approach and prior knowledge of students. Moreover, the data of practical skills through the observation sheets in the experimental class had higher percentage compared to the control class, 80.36%, and 70.61% respectively.

Tujuan penelitian ini adalah mengembangkan lembar kerja mahasiswa (LKM) untuk meningkatkan kemampuan literasi sains mahasiswa Jurusan IPA FMIPA Unesa. Kelayakan dari LKM yang dikembangkan yang diukur berdasarkan validitas teoritis dan empirisnya. Rancangan penelitian yang digunakan dalam mengembangkan LKM yang mengacu pada model Plomp (1997), yang terdiri dari fase investigasi awal (prelimenary investigation), fase desain (design), fase realisasi/konstruksi (realization/construc-tion), dan fase tes, evaluasi dan revisi (test, evaluation and revision), dan implementasi (implementation). Hasil penelitian ini menunjukkan bahwa LKM literasi yang telah dikembangkan layak digunakan yang didasarkan pada validitas teoritis dan empirisnya. Berdasarkan validitas teoritis, LKM secara isi, konstruksi, dan keterbacaan menunjukkan hasil baik, yaitu kategori sangat kuat untuk validasi isi dan kuat untuk validasi konstruksi. Validitas empiris dari LKM juga menunjukkan hasil positif, yaitu adanya peningkatan kemampuan literasi sains mahasiswa setelah diberikan LKM literasi pada mata kuliah IPBA dengan persentase ketercapaian literasi sains mahasiswa sebesar 100%. Kata Kunci : LKM, Literasi Sains.

This study aims to describe the activities of students in using student worksheets based on Contextual Teaching and Learning (CTL). The method used is descriptive quantitative. Student worksheets based on Contextual Teaching and Learning that are used in learning consist of three sub-layers are atmosphere, lithosphere, and hydrosphere. In CTL-based student worksheets, there are 7 main components of CTL are constructivist, questioning, modelling, finding, community learning, reflection, and authentic assessment. Learning outcomes using CTL-based Student Worksheets are easier for students to understand learning material, this is shown by students in solving problems on student worksheets properly. Based on the results of the study it can be concluded that learning by using Student Worksheets based on Contextual Teaching and Learning helps students more easily understand the subject matter.